n: a person who is an easy laugh. A laugh whore will typically laugh at all of your jokes just to gain acceptance from you. You don't mind it because it makes you feel better about yourself. Usually has a mildly obnoxious laugh to go along with his/her hair trigger laugh reflex.

Friend 1: Oh man, we had so much fun! It was just awesome!!
Friend 2: Nah man don't fall for it...she's a total laugh whore.

Friend 1: Yeah so then I said, 'because the frog was stapled to the chicken!'
Friend 2: Hahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahaha!!
Friend 1: Yeah I made that one up myself!!